Steam-boiler setting



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Q STEAM BOILER SZEYTTING. No. 380,197.

Patented Man. 27,1888. I

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W. U. PAIRBAIR-N.- STEAM BOILER SETTING.

No. 880,197. Patented 1V[a ;1 Z7, 1888.

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N. PETERS, Phniolithngraphsr, Washjngtvru D. C.

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. STEAM BOILER SETTING.

, No. 380,197, Patented Marp27, 1888.

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UNITED STATES PATENT OFFICE.

WILLIAM U. FAIRBAIRN, or HYDE PARK, MASSACHUSETTS.

STEAM-BOILER SETTING.

SPECIFICATION forming part of Letters Patent No. 380,197, dated March 27,1888.

Application filed March 14, 1887.

To all whom it may concern.-

Be it known that 1, WILLIAM U. FAIR- BAIRN, of Hyde Park, in the county of Norfolk and State of Massachusetts, a citizenof the United States, have invented a new anduseful Improvement in Steam-Boiler Setting, of which the following is a full, clear, and ex act description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

This improvement is designed to secure the most perfect combustion of combustibles employed to heat steam-boilers and to utilize as much as possible of the heat generated.

It consists in the arrangement in front of the flue in which the boiler is set of a combustionchamber in which the fuel is distilled .into combustible gases, and interpos'ing between such chamber and the flue beneath the boiler a bridge-wall perforated by two converging channels for the products of combustion, which channels are inclined upward and inward, so that the gases passing through them shall interfere before they strike the shell of the boiler.

In the drawings, Figure l is a vertical longitudinal section which exposes the boiler in elevation and the combustion-chamber and its duct as if the out were made along one of the lines as a: or y y of Fig. 4.. Fig. 2 is a transverse vertical section along the'broken line 2 z z z z of Fig. 1, whereby a view is given of the uptake, the flue-sheet, the center ofthe roof of the combustion-chamber, and the end of the combustion-chamber. Fig. 3 is an end elevation of the exterior of the front of the boilersetting. Fig. 4 is a sectional plan of the roof of the combustion-chamber, taken through the air-tubes.

Like letters represent like partsin all the figures.

A is the boiler. It is set with a largefiue, B, under it. The flame returns through tubes, which are shown at Gin Fig. 2, and is carried away by the uptake D, which leads to the stack. In front of this boiler is .the usual boiler-front with doors, as shown at E, Fig. 3. Alarge fire-box, F, Fig. l, is built in front of this boiler, and it has a roof the top of which about coincides with the bottom of the boiler. A thick and heavy bridge-wall, G, is interv posed between this fire-box F and the flue B Serial No. 230,818. (No model.)

bustion, when they pass into the flue B, will enter upon two lines which converge laterally and coincide in their upward direction.

Through the roof of the combustion-chamber are made sinuous channels g,'the delivery ends of which converge, so that the current'of air to support combustion will interfere with the current of combustible gas, and by the interference of these gaseous currents make a thorough mixture of the air to support combustion. 1 with the combustible gases, and both of them being at high temperatures the combustion will be very perfect, the more so because these interfering currents will cause the gyratory movement of the gases in the flue B, which is considered so important to secure perfect com bustion, with a minimum admission of air,that the fan-blower is frequently recommended for use, even at the expense of,considerablepower, in order to produce'this effect.

To control the admission of air according to the necessities of combustion, a register, h, is applied to the induction-orifice of each of the air-tubes, g, and this register may be automatically controlled by the heat of the furnace by placing in the furnace-roof,asshown at Fig. 4, a metallic rod, i, with a tapering end. This rod is held at its proper position byhaving its abutment firmly fixed in thebrick-work of the boiler, and the lengthening and shortening of this rod will cause its conical end to protrude more or less, the protrusion of the end of the rod serving to give-lateral movement toa system of levers and links shown in Fig. 5, in which the movement of the'rod i longitudinally causes the power end of the lever is to be displaced laterally, and hence'to communicate motion to the link e, and through that to the handle in of the register h, thus causing it to revolve upon its center and adrnit more or less air to the tubes 9, as may be desired.

The fire-box Fmay be fed either through the fire door at the side marked a, Fig. 1, or through a fire door in the top; and when using wood, chips, tan,or the like it will probably be better to feed through the top.

I am aware of Patent N o. 3l0,582,to Gulickson, and No. 271,989, to Ritchie, both of which show two passages in the bridge-wall connecting the furnace with a fluebeyond; but neither of these passages are inclined positively in an upward and inward direction, so that the gases of combustion are deflected by said passages and caused to come together or unite in front of the bridge-wall and below the lowermost point of the boiler. Neither do these patents describe any connection with flues in a bridgewall which direct the gases of combustion from the furnace to a common concentrating-point immediately in front of the bridge-wall, with air-inlets arranged to supply air to these gases at their said converging-point,or immediately in front of the bridge-wall, and I therefore consider that they do not contain the essential elements of my invention.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of of the United States- 1. The combination,with the main flue B of a boiler-setting, of the fire-box F, by means of the upwardly-directed converging channels f through the bridge-wall, substantially as described.

2. The combination of the main flue B of a boiler-setting with a fire-box placed in front thereof, with the upwardly-directed and converging flues f, and the air-channels 9, sub stantially as described.

3. The combination, in a boiler'setting of a fire-box, F, placed in front of and below the body of the boiler A, and provided with a bridge-wall, G, separating the main flue B of the boiler-setting from the fire-box F, which bridge-wall G is perforated by the upwardlydirected and converging as described.

4. The combination of the boiler'A with the firebox F,located below the body of the boiler and in front of the flue sheet thereof, and the main flue B of the setting,which said firebox F is separated from the flue B bya bridge wall, G, through which bridge-wall G the upwardly-inclined and converging passages f are made, substantially as described. 5. The combination of the boiler A with its setting, which setting contains the flue B, and the fire-box F, situated in front of and below the body of the boiler and in front of theflne B, and connected with said flue B by upwardly-inclined and converging passages f, and the air-channels g in the roof or walls of said fire-box, substantially as described.

6. In a boiler-setting, the combination of a fire-box, F, the bridge-wall G, separating the main flue B of the boiler-setting from the firebox F, the upwardly-directed converging flues f, the air-channels g, the bevel-ended thermostatic rod 13, the register h, and the system of levers and links k l m, substantially as described.

7. The combination of the converging airchannels 9 with the converging and upwardlyflues f, substantially directed gas-channels f and the fire-box F v and main flue B, all being contained in and surrounded by the boiler-setting,substantially as described.

8. The boiler-setting containing the main flue B, the firebox F, the upwardly-directed andconverging flues f, and the converging air-channels 9, all substantially as and for the purposes described.

WILLIAM U. FAIRBAIRN.

Witnesses:

J. M. DOLAN, FRED. B. DOLAN. 

